Yes I have heard all of that. He still is FAR richer than I am. So let him give until he reaches my level. Then he can give me adivce.
I'm sure his giving 25 years of salary back to his church and 90% of his earnings from his book is far more than you or I would ever likely give in all honesty. Besides God doesn't look at the amount a person gives but in what spirit it is given.